64-67 327 suffix code XXB

[rlewis]

Hi, I am new to forum and may make some mistakes, but here goes. I have run across my 2nd engine in the last 3 yrs with this suffix number and have not been able to identify what they came out of.the casting # 3892657 (date code L86) is 327 eng 64-67  I read inquiries that were posted in2007 Di any ever find the code information Thanks for info

[JohnZ]

It's most likely a marine, industrial, or stationary power application; 3-digit suffixes for normal production car/truck applications didn't start until 1970. I only show 2-digit suffixes starting with "X", and they're all truck usages.

[Z71]

My info indicates replacement engines from GM parts or GM Performance parts, don't know anything more about them.  

I have notes in my old GM parts catalog on XXB, XBB, XBA etc being parts dept engines (might be made in Mexico?)  

All the marine and industrial engine codes I have all begin with a number, followed by 2 letters.